Marcel, SalatheChristian, Althaus L.Richard, NeherSilvia, StringhiniEmma, HodcroftJacques, FellayMarcel, ZwahlenGabriela, SentiManuel, BattegayAnnelies, Wilder-SmithIsabella, EckerleMatthias, EggerNicola, Low2020-04-082020-04-082020-04-082020-03-1910.4414/smw.2020.20225https://infoscience.epfl.ch/handle/20.500.14299/168038WOS:000521155600001Switzerland is among the countries with the highest number of coronavirus disease-2019 (COVID-19) cases per capita in the world. There are likely many people with undetected SARS-CoV-2 infection because testing efforts are currently not detecting all infected people, including some with clinical disease compatible with COVID-19. Testing on its own will not stop the spread of SARS-CoV-2. Testing is part of a strategy. The World Health Organization recommends a combination of measures: rapid diagnosis and immediate isolation of cases, rigorous tracking and precautionary self-isolation of close contacts. In this article, we explain why the testing strategy in Switzerland should be strengthened urgently, as a core component of a combination approach to control COVID-19.Medicine, General & InternalGeneral & Internal Medicinecovid-19sars-cov-2testingtext::journal::journal article::research article